content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.basetypes;
  
  import java.util.concurrent.atomic.*;
  
  import org.reactivestreams.*;
  
  import io.reactivex.rxjava3.internal.subscriptions.*;
  
  /**
   * Retries the source Solo at most the given number of times.
   *
   * @param <T> the value type
   */
  final class SoloRetry<T> extends Solo<T> {
  
      final Solo<T> source;
  
      final long times;
  
      SoloRetry(Solo<T> source, long times) {
          this.source = source;
          this.times = times;
      }
  
      @Override
      protected void subscribeActual(Subscriber<? super T> s) {
          RetrySubscriber<T> parent = new RetrySubscriber<>(s, times, source);
          s.onSubscribe(parent);
          parent.subscribeNext();
      }
  
      static final class RetrySubscriber<T> extends DeferredScalarSubscription<T>
      implements Subscriber<T> {
  
          private static final long serialVersionUID = -1726278593241855499L;
  
          final AtomicInteger wip;
  
          final AtomicReference<Subscription> upstream;
  
          final Solo<T> source;
  
          long times;
  
          volatile boolean active;
  
          RetrySubscriber(Subscriber<? super T> downstream, long times, Solo<T> source) {
              super(downstream);
              this.times = times;
              this.source = source;
              this.wip = new AtomicInteger();
              this.upstream = new AtomicReference<>();
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              if (SubscriptionHelper.replace(this.upstream, s)) {
                  s.request(Long.MAX_VALUE);
              }
          }
  
          @Override
          public void onNext(T t) {
              value = t;
          }
  
          @Override
          public void onError(Throwable t) {
              long c = times;
              if (c != Long.MAX_VALUE) {
                  if (--c == 0L) {
                      downstream.onError(t);
                      return;
                  } else {
                      times = c;
                  }
              }
  
              active = false;
              subscribeNext();
          }
  
          void subscribeNext() {
              if (wip.getAndIncrement() == 0) {
                  do {
                      if (SubscriptionHelper.CANCELLED == upstream.get()) {
                          return;
                      }
  
                      if (!active) {
                          active = true;
                          source.subscribe(this);
                      }
                  } while (wip.decrementAndGet() != 0);
              }
          }
  
          @Override
          public void onComplete() {
              T v = value;
              if (v != null) {
                  value = null;
                  complete(v);
              } else {
                  downstream.onComplete();
              }
          }
  
          @Override
          public void cancel() {
              super.cancel();
              SubscriptionHelper.cancel(upstream);
          }
      }
  }
  